Apparatus for making boiler-coils.



N0 68l,243. Patented Aug. 27, I90il. 8. D. MOTT.

APPARATUS FOR MAKING BOILER SOILS.

(Applicatiun filed Dec. 4, 1900.

(No Model.)

i of which the following is a full, clear, and

UNITED r STATES PATENT UFFICE.

SAMUEL D. MOTT, OF PASSAIO, NEVY JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS,TO MOTORMOBILE COMPANY, OF JERSEY CITY,

new JERSEY.

APPARATUS FOR, MAKING BOILER-COILS.

. SPEGIFIGAEION: forming part of Letters Patent No. 681,243,.dated August 27, 1901.

Application filedDecemher 4,1900- Serial No. 38,698. (No model.)

Passaic, Passaic county, New Jersey, have invented certain new and useful Improvenients inApparatus for Making Boiler-Coils,

exact description.

My invention relates to improvements in apparatus for making coils, and especially 1 1o duplex or compound coils for steam-boilers.

pensive apparatus which is adapted to work i of operation.

I have invented a coil for boilers in which the tube forming a coil is made into a series of loops of different diameters, which may be essentially concentric and disposed so that a great heating-surface is produced, to the end that steam maybe quickly made. Coils of this class, which I have illustrated in this application to make my invention clear, cannot be easilyproduced by ordinary means; and to this endthe object of my present invention is to produce a very simple and inexeasily and rapidly and to produce duplex or compound coils of the kind referred to.

With these ends in view myinvention consists of an apparatus for making boiler-coils the construction and arrangement of which will be hereinafter specifically described and claimed. 1

Reference is to be had to the accompanying drawings, formingpart of this specification, in which similar figures of reference refer to similarparts throughout the several views.

Figure 1 is a brokenfront elevation of my improved apparatus, the disks being in part separated to show more clearly their mode Fig. 2 is an inside elevation of one of the half-disks. Fig. 3 is an inside elevation of a half-diskadapted to be opposed to the disk shown in Fig. 2, so that when the two are combined they will make a complete disk. Fig. 4 is a detail elevation of one of the collar-disks which are made to alternate with the combined disks shown in Figs. 2 and 3. Fig. 5 is an inside elevation of a" combined disk. collar and disk. Fig. 6 is aside elevation of one of the duplex or compound coils as it leaves theapparatus. Fig. 7 is a perspective view of such a coil when opened out slightly, as for practical use. Fig. 8 is a side elevation of a compound coil and shows in dotted lines how a second coil may be compactly combined with it. Fig. 9 is a plan view illustrating one mode of connecting to a header coils of the kind referred to. Fig. 10 is a plan view illustrating another form of arranging the coils in connection with a central header, and Fig. 11 is a plan View of a modified form of coil.

In carrying out my invention it is necessary not only to provide means for coiling a pipe into loops of difier'ent sizes, but the apparatus must be easily separable, so as to permit the removal of the coil from the forming apparatus. To this end I use a series of disks, each made up of the two half-disks 10 10*, as shown in Fig. l, and the half-disks are concaved on the inner sides of their faces, so that when two of them are placed together, with their concaved parts adjacent, an essentially semicircular-faced groove will be produced, as the drawing clearly shows. This enables the pipe to lie snugly in the groove.

' These disks 1O 1O are used in alternation with disk-collars 12,which have the combined function of guiding-disks and of collars for spacing the disks 1O 10% and the whole series of disks are mounted on a mandrel 11, the disks and disk-collars each having a central hole or bore 13 to fit the mandrel and having also a key-seat 14. to fit the key 15 on the mandrel. This arrangement enables the whole series of disks and disk-collars to be easily slipped on and off the mandrel, while the whole will turn in unison with the mandrel. Of course other means may be substituted for permitting the removal of the disks and disk collars and for preventing them from turning; but the arrangement shown is simple and advisable. To permit the halfdisks 10 10 to come together snugly and to fit nicely, one can be provided with a hub 10 and the other with a corresponding socket 10, as shown at the left hand in Fig. 1. The disks and disk-collars are held on the mandrel 11 between a suitable collar 17 and a nut 18, which fits the thread on the mandrel. In arranging them on a mandrel a complete disk made up of the two half-disks 10 10 is placed on the mandrel, then a collar 12, then another complete disk, then another disk-collar, and so on, when the whole maybe clamped tightly together. The mandrel may also be provided with a suitable lathe-dog 19, so that the whole affair may be placed in an ordinary machinelathe.

It is obvious that means must be provided for guiding the pipe to be coiled on and off the several disks. To this end the part 10 of each complete disk has a guide-groove 20 leading from the outside and winding gradually into the main groove, and a similar part 20 is produced on the inner side of the half-disk 10, so that the parts 20 and 20 may register and a complete winding guide-groove be provided. On the other hand, after a loop is made around the complete disk 10 10 means must be provided for the easy discharge of the pipe to the disk-collar 12. To this end the guide-grooves 21 on the disk 10 and 21 on the disk 20 When brought into registry form a continuation or extension winds inward toward the disk-collar 12, as shown in Fig. 1 and by the dotted lines in Figs. 2 and 3.

The disk collar 12 is preferably somewhat oval or elliptical in shape, as shown in Fig. 4, although it will be understood that any reasonable departure from circular shape may be made in all the disks and disk-collars, if desired; but when of the shape described the high part 12 of the disk-collar is made to come opposite the guide-grooves 20 20 and 21 21 of the disks, so as to make an easy transition from a disk to a disk-collar or from a disk-collar to a disk.

The apparatus illustrated and described above is intended to produce the coil 22. (Shown in Figs. 6 to 10.) This is made up of a pipe 23, which is formed into a series of greater and smaller loops 24 and 25. In carrying out the invention one end of a pipe 23 is made fast in some way, as by an ordinary clamp, to the collar 17 or to the mandrel 11, and the operator as the mandrel revolves guides the pipe, which of necessity in boilers of this kind is light and flexible, into the guide-groove 20 of the first disk 10 10 and so on into the main groove of the disk, and as the disk revolves the first loop 24 will be made and the pipe, which is held taut by the operator, guided through the grooves 21 21 upon the first disk-collar 12, which it will circle and be again guided to the next disk 10 10 and so on, until the whole series of disks have been traversed and the coil is complete. In this connection it will be understood. that any necessary number of disks can be used to make a coil of the desired length. It will be seen that after a coil is made it will lie snugly on the disks and diskcollars, and if they were immovable the coil could not be removed without injury; but as constructed the nut 18 may be removed and the mandrel pulled from out the disks and disk-collars, which can then be easily sepa: rated, thus leaving a complete coil,which will be substantially as shown in Fig. 6. The coils will necessarily be separated a little to remove the several half-disks 10 10 and before it is used it will be separated rather more, so as to assume the shape illustrated in Fig. 7; but it will be understood that as coils of this kind are of light tubing they may be made tothe loops 24, thus making the two concentric,

and then the loops 24 of an adjacent coil can be made to slip between the loops 24 of the first coil, as shown by dotted lines in Fig. 8. A series of these coils can be arranged'with many different styles of header. This is illus trated clearly in Figs. 9 and 10', which show two of such styles. In Fig. 9 the ordinary rectangular header 27 has the pipe ends of the several coils connected to it, and in Fig.- 10 a central header 28 is illustrated, to which the several coils are connected, these being grouped around the header.

In Fig. 11 I have illustrated a coil like that shown in Figs. 6 to 10, except that'it has one more loop 26, and it will be understood that in producing such a coil another series of disks, like the disks 10 10 would be necessi tated, which disk should be still larger than the disks 10 10*.

I claim the coil illustrated in Figs. 6 to 11 as my invention; but do not claim it in this application, although it is completely illustrated to show fully the use of the invention which is set forth in Figs. 1 to 5. In the claims, as in the specification, I shall refer to the parts 10, 10, and 12 as disks and disk collars, but it will be understood that by such terms I mean any equivalent devices which will produce the effect described.

Having thus described my invention,what I claim as new, and desire to secure byLetters Patent, is-

1. An apparatus of the kind described,con1- prising a mandrel and a series of alternating guide-disks and disk-collars mounted on the mandrel so as to turn therewith, the disks having grooved faces with side extensions leading toward the collars.

2. In an apparatus of the kind described, the guide-disks having a grooved face, each complete disk formed of two half-disks, and each half-disk having a lateral groove curving toward the center and merging into the main groove of the face.

3. An apparatus of the kind described,-com= prising a supporting-mandrel and a series of disks and disk-collars held to slide on and turn with the mandrel, each disk having a grooved face and being formed of two halfdisks and each half-disk having a grooved guideway curving from the main groove of the face toward the center of the half-disk.

4. An apparatus of the kinddescribed,co1n- In testimony whereof I have signed my prising a mandrel and aseries of alternating name to this specification in thepresence of to guide-disks and disk-collars mounted on the two subscribing Witnesses. mandrel so as to turn therewith the disks 5 having grooved faces with side extensions SAMUEL MQTT leading toward the collars and being separa- WVitnesses: ble centrallyin a plane perpendicular to their JOHN D. GRIFFEN, axes. t W. B. HUTCHINSON. 

